Thanks a ton. It helps.

No, Not on PROD but on DR (Subnet B) [Subnet B= DR + PRE-PROD]

Thanks for this.

One more question. Though silly one. Can i install another instance on the subnet B (for PRE-PROD and one installed previously was DR (on Subnet B)) and include...

Thanks. It helped a lot.

Please ignore my ignorance. What are the criterias where this need s to run.

I think that this is a standard process after upgrade.

Thanks.

Is that not required? What if I rollback? Any side effects?